/Engine/Plugins/Importers/USDImporter/Source/USDSchemas/Public/USDInfoCache.h
Returns a list of all prims we have generic info about.
[TSet](API\Runtime\Core\Containers\TSet)< [UE::FSdfPath](API\Plugins\UnrealUSDWrapper\UsdWrappers\FSdfPath) > GetKnownPrims() const